Sliding a New Bridge in Place - Using Dishwasher Soap

It's true. The Nevada Department of Transportation is working on a new bridge project that is getting a lot of attention nationwide. They are going to replace the bridges at the I-15 interchange 120 in West Mesquite. The technique includes building the new bridges next to the old ones, destroying the old one then sliding in the new ones, all in one night. And to slide the bridges in engineers will use dishsoap.